If you are having problems with themes in Windows 8, it is entirely possible that you have to restart your Windows 8 themes service.Windows 8, Microsoft's brand new operating system, provides options to choose among many themes available for its appearance, to suite users' tastes and moods. If you are a user of the Windows 8 operating system then there are certain steps you have to follow and these steps are:

Step 1: Open the Search.

Step 2: Now type service.msc into the Metro search bar and press enter. Now click on the Services option.

Step 3: The list of Windows 8 services appears. Now you can scroll down, hit T on the keyboard to jump to Themes.

Step 4: Select THEMES and then Click on Restart link to restart the service

Note:

The service will automatically as you click on it. If you have the problem of it not restarting then check your graphic drivers.